Rollup of 10 pull requests#77904

Closed

JohnTitor wants to merge 27 commits into

rust-lang:masterfrom

JohnTitor:rollup-sgh0tap

Commits on Oct 5, 2020

BTreeMap: derive type-specific variants of node_as_mut and cast_unchecked
ssomers
committed

Commits on Oct 8, 2020

Remove unnecessary rustc_const_stable attributes.
m-ou-se
committed

Commits on Oct 10, 2020

Mention rustdoc in `x.py setup`
jyn514
committed

Commits on Oct 11, 2020

`min_const_generics` diagnostics improvements
eopb
committed

Commits on Oct 12, 2020

Commits on Oct 13, 2020